Strings are stretched between pegs and a tailpiece both forming parts of an electric base; the strings passes through the space between the body and the tailpiece, and are folded over the obverse surface of the tailpiece; although the body is shorter than that of a standard electric base, the decorative end portions, which are covered with colored yarns, do not reach a bridge, and are not bowed in performance; thus, the tailpiece makes it possible to use the short body without sacrifice of the tactile sense at the fingers in the bowing.